The victory allowed the Bruins to remain in first place in the Northeast Division and take over the top spot in the Eastern Conference.
The Boston Bruins tied the score at 1-1 early in the third period when Tyler Seguin took a pass from David Krejci and slipped the puck by Carey Price.
Krejci scored less than two minutes later when he deflected a shot by Milan Lucic to give Boston a 2-1 lead.
The Canadiens scored on the power play in the second period when P.K. Subban let a big blast go from the point that flew past Tuukka Rask .
Bruins defeat Canadiens 2-1